[PATCH v2] ole32: Check invalid parameters for ReleaseStgMedium().

[Huw Davies]

On Fri, Sep 25, 2020 at 10:22:51AM +0800, Chao Long wrote:
> libcef call parameters is NULL for app Evernote.exe.

Thanks.  I've tweaked the commit message slightly and
sent in a v3.

Huw.